/Engine/Source/Runtime/RenderCore/Public/ProfilingDebugging/RealtimeGPUProfiler.h
Function for logging a PIX event with var args
void Start ( [IRHIComputeContext](API\Runtime\RHI\IRHIComputeContext) & InRHICommandContext, [FColor](API\Runtime\Core\Math\FColor) Color, const TCHAR * Fmt, ... )